The concept of the paleo diet is to consume food that is compatible with the development of our biological bodies. As described in detail in : Man’s Evolutionary Path Versus Modern Lifestyle, according to the Darwinian Theory, our bodies (our genetic structure) slowly, over millions of years, is constantly adapting to our environment. In nature, apart from natural disasters, our environment changes extremely slowly over epochs of time.
However with the rush into modernity and its introduction of highly processed foods most of us are now consuming a diet which is completely different from what was consumed traditionally over the past millenniums. For example (see: Health, Nutrition and Supplementation) in the 1800’s we consumed about 18 lbs. of sugar per year, but today we consume annually amounts in excess of 200 lbs. So it is with many other food ingredients including salt, trans-fats and food preservatives, emulsifiers, extenders, colorings and taste enhancers. plus modern food processing techniques lowers their natural nutritional value. Thus although the technological wonders of modernity have bought us food in great quantities enhanced with an almost endless list of tempting variations, its fundamental quality and compatibility with the human digestive system is highly questionable.
Today the paleo diet, following common sense, is an attempt to realign man’s dietary customs back to that which is compatible with our biological requirements.